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Hedging “Sudden Stops” and Emergent Recessions through International Reserves in Egypt—An Application of the Martingale Optimality Principle Approach

机译:通过埃及国际储备对冲“突然停止”和紧急衰退 - 鞅最优性原理方法的应用

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This paper addresses the role of international reserves in mitigating the adverse effects of potential “sudden stops” on economic growth. As holding of reserves implies a cost in terms of domestic consumption, we calculate the optimal level of reserves that helps hedge against such eventuality. Treating it as an optimization problem, we employ the Martingale Optimality Principle to estimate the optimal values of reserves and consumption. For Egypt, we find that optimal consumption is trending upward when the optimal level of reserves is trending downward. Using stochastic control, we obtain another approximate or suboptimal set of values for both variables. These values closely mimic Egypt’s observed reserve and consumption measurements. Our findings indicate that Egypt’s actual reserves during 1985-2017 exceed estimated optimal levels of reserves, even under a highly risk averse scenario, and point out to the implied consumption costs.
机译:本文涉及国际储备在减轻潜在“突然停止”对经济增长的不利影响方面的作用。 随着储量的持有意味着在国内消费方面的成本,我们计算有助于对冲对冲此类可能性的最佳储备水平。 将其视为优化问题,我们采用Martingale最优原理来估计储备和消费的最佳价值。 对于埃及,我们发现,当最佳储量水平向下培训时,最佳消耗是向上培训。 使用随机控制,我们获得两个变量的另一个近似或次优的值。 这些值密切模仿埃及观察到的储备和消费测量。 我们的调查结果表明,即使在高风险的厌恶情景下,埃及在1985 - 2017年的实际储备超过了估计的最佳储备水平,并指出了隐含的消费成本。

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